Rotary paving cutter



y 1960 A. K. ZORN 2,935,308

ROTARY PAVING CUTTER Filed June 8, 1959 IN VEN TOR. A/i/fiflfW 2024/ATTOX/VE nite Sttes Patent ROTARY PAVING CUTTER 7 Andrew K. Zorn,Levittown, Pa.

Application June 8, 1959, Serial No. 818,804

4 Claims. (Cl. 262-20) The present invention is directed to a rotarypaving cutter, and more particularly to a rotary paving cutter forscoring and/or cutting asphalt or concrete paving or the like.

There has been a long felt need for a satisfactory tool for cuttingprecise boundaries about an area of faulty pavement. For example, in thepatching of roads and highways, it is necessary to define an area whichis to be removed and replaced. At the present time crude techniques andapparatus are conventionally utilized for cutting pavements androadbeds, such as impact tools and hammers.

This invention has as an object the provision of a novel rotary pavingcutter.

This invention has as another object the provision of a paving cutterwhich may be automatically operated.

This invention has as a still further object the provision of a pavingcutter of relatively low cost construction which possesses a greatdegree of durability and strength.

Other objects will appear hereinafter.

For the purpose of illustrating the invention there is shown in thedrawings a form which is presently preferred; it being understood,however, that this invention is not limited to the precise arrangementsand instrumentalities shown.

Referring to the drawings wherein like reference characters refer tolike parts:

Figure 1 reveals the rotary paving cutter of the present invention shownin end elevation.

Figure 2 is a side elevational view of the rotary paving cutter of thepresent invention secured to road equipment.

Figure 3 is a sectional view taken along line 3-3 of Figure 1.

Referring to the drawings, the present invention comprises the rotarypaving cutter designated generally as 10, which rotary paving cutter isoperatively engaged with road equipment 12.

Road equipment 12, which is shown in phantom line in Figure 2, maycomprise any conventional power operated road vehicle, such as a tractoror the like.

A Wide variety of means may be utilized for securing the rotary pavingcutter to the road equipment 12. In the illustrated embodiment therotary paving cutter 10 comprises the upright 14 whose front edges 16are notched at 18, which notches 18 are engaged with a mating clampingelement in the road equipment 12.

The upright 14 may comprise a forged steel frame member which is lapwelded to the rod 20 of the clevis 21. The clevis 21 comprises the legs22 and 22 which are welded at 24 to the rod 20.

The legs 22 are provided with mating similar aligned holes 26 throughwhich the bolt 28 may be passed. The bolt 28 is threaded at its endremote from its head, and carries the nut 30 at such threaded end.

The cutter wheel 32 is rotatably carried on the bolt 28 intermediate thelegs 22 and 22 of clevis 21. The cutter wheel comprises a disc which isbeveled at 32 to provide the sharp edge 36 and which is welded to thePatented May 3, 1960 by the weld metal 40.

The bushing 42 is force-fitted into the hub 38 The journal 44 which isforce-fitted onto the axle of the bolt 28 is juxtaposed to the insidesurface of the bushing 42.

A lubricant tap 46 may be provided on the exterior of the hub 38, whichlubricant tap 46 is in communica tion through the aligned openings 48and 50 in the hub 38 and bushing 42 with the clearance intermediate thebushing 42 and. the journal 44. This enables pressure grease lubricationto be furnished intermediate the bushing 42 and the journal 44.

The rotary paving cutter of the present invention may be dragged orpushed along the paving surface which is being cut. Preferably, thecutter should have sulficient mass of its own to effect a cutting actionupon the pavement over which it is being moved. However, if desired, therotary paving cutter may be downwardly urged by. the road equipment 12.

The side-by-side arrangement of the upright 14 and the rod 20, with theend of the upright 14 being abutted to one of the legs 22 of the clevis21 permits a high degree of rigidity to be achieved by the rotary pavingcutter of the present invention.

The present invention may be embodied in other specific forms withoutdeparting from the spirit or essential attributes thereof and,accordingly, reference should be made to the appended claims, ratherthan to the foregoing specification as indicating the scope of theinvention.

I claim:

1. A rotary paving cutter comprising a rigid metal upright adapted atoneend to be attached to a road vehicle, a clevis comprising a rigid rodhaving a pair of spaced apart legs secured to and extending from one endthereof, the free end portions of said legs being substantiallyparallel, said clevis being rigidly secured to the other end of theupright with the rod in side-by-side, overlapping relation with theupright and the upper end of one of the legs abutting the end of theupright, and a cutting wheel rotatably supported between the free endsof the clevis legs.

2. A rotary paving cutter comprising arigid metal upright adapted at oneend to be attached to a road vehicle, a clevis comprising a rigid rodhaving a pair of spaced apart legs welded to one end thereof andextending therefrom, the free end portions of said legs beingsubstantially parallel, said rod being in side-by-side, overlappingrelation with the other end of said upright and welded thereto, theupper end of one of the legs abutting against the end of the upright,and a cutting wheel rotatably supported between the free ends of theclevis legs.

3. A rotary paving cutter comprising a rigid metal upright adapted atone end to be attached to a road vehicle, a clevis comprising a rigidrod having a pair of spaced apart legs welded to one end thereof andextending therefrom, the free end portions of said legs beingsubstantially parallel, said rod being in side-by-side, overlappingrelation with the other end of said upright and welded thereto, with theupper end of one of the legs abutting against the end of the upright, abolt extending through aligned holes in the free ends of the clevislegs, said bolt having a head on one end abutting the outer surface ofone of the legs and having its other end threaded, a nut threaded on thethreaded end of the bolt and abutting against the outer surface of theother leg, a journal force-fitted on the bolt between the legs, a hubrotatably mounted on the journal, and a cutter wheel secured to theouter surface of the hub, said cutter wheel comprising a disc having abeveled periphery providing a sharp cutting edge.

4. A rotary paving cutter comprising a rigid metal upright having aplurality of spaced notches in the front edge thereof adjacent of itsends for engaging with means for clamping the upright to a road vehicle,a clevis comprising a rigid rod having a pair of spaced apart legsWelded to one end thereof and extending therefrom, the free end portionsof said legs being substantially parallel, said rod being inside-by-side, overlappingrelation with the other end of said upright andwelded thereto, with the upper end of one of the legs abutting againstthe end of the upright, a bolt extending through aligned holes in thefree ends of the clevis legs, said bolt having a head on one endabutting the outer surface of one of the legs and having its other endthreaded, a nut threaded on the I threaded end of the bolt and abuttingagainst the outer References Cited in the file of this patent UNITEDSTATES PATENTS 2,890,872 Hall June 16,?9 59

